Re: [9fans] NeoMagic MagicGraph 128 (NM2070, 10c8/0001)

[jmk@plan9.bell-labs.com]

Looking at the XFree86 code (which is is the only documentation
available, I believe), you see the 2070 is the odd man out, requiring
extra fiddling. I suspect that whoever did the original code thought
it wasn't worth the effort for what looks like the oldest chip
especially if there was no hardware on hand to test it on.

It's probably not hard to add, start with
.../xc/programs/Xserver/hw/xfree86/drivers/neomagic/neo_driver.c
and just step through it looking for the string "2070" and comparing
what's there to what's in /sys/src/cmd/aux/vga/neomagic.c and
/sys/src/9/pc/vganeomagic.c. It looks like you may have to alter
the latter of those for acceleration.

--jim

On Sat Jan  8 17:57:01 EST 2005, davide+p9@cs.cmu.edu wrote:
> vgadb and aux/vga explicitly rejects this chip as unsupported.
> 
> Sure enough, if add the "appropriate" case statements there and
> in the kernel I get a screen full of hash.
> 
> Any hints on what's wrong?  Does whoever declared the chip
> unsupported remember whether there was a known problem which
> was the obstacle, or just a lack of debugging cycles?
> 
> Dave Eckhardt